Yes, the error message is gone. Thanks.
One new question. I came across this site regarding the lost hightlights problem in PhotoCD http://tedfelix.com/PhotoCD/PCDSoftware.html
I have tested with the latest version of ImageMagick and the result is still the same. I tried out the modified DLL supplied at that site by replacing IM_MOD_RL_pcd_.dll in coders subfolder. However, there was error occurred.
May I know how to test that modified PhotoCD DLL (or other PhotoCD DLL) in ImageMagick?